20871990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{7481}}^1$

素因数の和:7525

約数の個数: 48

約数和(自身を含む): 56025216

約数和(自身を除く): 35153226

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 31, 45, 62, 90, 93, 155, 186, 279, 310, 465, 558, 930, 1395, 2790, 7481, 14962, 22443, 37405, 44886, 67329, 74810, 112215, 134658, 224430, 231911, 336645, 463822, 673290, 695733, 1159555, 1391466, 2087199, 2319110, 3478665, 4174398, 6957330, 10435995, 20871990]

約数ペア:

[(1, 20871990), (2, 10435995), (3, 6957330), (5, 4174398), (6, 3478665), (9, 2319110), (10, 2087199), (15, 1391466), (18, 1159555), (30, 695733), (31, 673290), (45, 463822), (62, 336645), (90, 231911), (93, 224430), (155, 134658), (186, 112215), (279, 74810), (310, 67329), (465, 44886), (558, 37405), (930, 22443), (1395, 14962), (2790, 7481)]